net.wicp.tams.commons.apiext

类 ByteUtil

java.lang.Object

net.wicp.tams.commons.apiext.ByteUtil

public abstract class ByteUtil
extends Object

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	ByteUtil.AssitRead 读帮助类
static class	ByteUtil.AssitWrite 写帮助类

构造器概要

构造器

构造器和说明
ByteUtil()

方法概要

方法

限定符和类型	方法和说明
static byte[]	and(byte[] data1, byte[] data2)
static int	byteshas0(byte[] bytes) bytes含有0的个数
static int	byteshas1(byte[] bytes) bytes含有1的个数
static byte[]	concat(byte[] data1, byte[] data2)
static boolean	equals(byte[] data1, byte[] data2)
static byte[]	or(byte[] data1, byte[] data2)
static int	readInt(byte[] bytes, boolean littleEndian) 虽然int占4个字节，但有一个符号位，如果要得到无符号的int，bytes最多只能为3，如果大于3字节，请用readLong
static int	readIntB(byte[] bytes)
static int	readIntL(byte[] bytes)
static int	readIntL(byte[] bytes, int offset, int length)
static int	readIntSigned(byte[] bytes) 读带符号的整形
static long	readLong(byte[] bytes, boolean littleEndian) 读无符号的long
static long	readLongB(byte[] bytes)
static long	readLongL(byte[] bytes)
static long	readLongL(byte[] bytes, int offset, int length)
long	readLongSigned(byte[] bytes) 读带符号的Long
static String	readString(byte[] bytes)
static String	readString(byte[] bytes, int offset, int length)
static byte[][]	splitBytes(byte[] data, int maxLength) 把data分隔成每行最多maxLength列的多行数组
static byte[]	toBigEndian(byte[] value) 小字节序转为大字节序
static byte[]	toByteArray(byte num)
static byte[]	toByteArray(int num)
static byte[]	toByteArray(long num)
static byte[]	toByteArray(short num)
static int	toUnsigned(byte b) 得到无符号int
static long	toUnsigned(int i) 得到无符号long
static int	toUnsigned(short s) 得到无符号int
static byte[]	trunc00(byte[] bytes) 把前后的00二进制去掉进，要求中间不出现00
static byte[]	xor(byte[] data1, byte[] data2)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

ByteUtil

public ByteUtil()

方法详细资料

toBigEndian

public static byte[] toBigEndian(byte[] value)

小字节序转为大字节序

参数:

value -

返回:

toUnsigned

public static int toUnsigned(byte b)

得到无符号int

参数:

b -

返回:

toUnsigned

public static int toUnsigned(short s)

得到无符号int

参数:

s -

返回:

toUnsigned

public static long toUnsigned(int i)

得到无符号long

参数:

i -

返回:

readLong

public static long readLong(byte[] bytes,
            boolean littleEndian)

读无符号的long

参数:

bytes -

littleEndian -

返回:

readLongL

public static long readLongL(byte[] bytes)

readLongL

public static long readLongL(byte[] bytes,
             int offset,
             int length)

readLongB

public static long readLongB(byte[] bytes)

readLongSigned

public long readLongSigned(byte[] bytes)

读带符号的Long

参数:

bytes -

返回:

byteshas1

public static int byteshas1(byte[] bytes)

bytes含有1的个数

参数:

bytes -

返回:

byteshas0

public static int byteshas0(byte[] bytes)

bytes含有0的个数

参数:

bytes -

返回:

readInt

public static int readInt(byte[] bytes,
          boolean littleEndian)

虽然int占4个字节，但有一个符号位，如果要得到无符号的int，bytes最多只能为3，如果大于3字节，请用readLong

参数:

bytes - 要转的字节

littleEndian - 是否小字节序

返回:

readIntL

public static int readIntL(byte[] bytes)

readIntL

public static int readIntL(byte[] bytes,
           int offset,
           int length)

readIntB

public static int readIntB(byte[] bytes)

readIntSigned

public static int readIntSigned(byte[] bytes)

读带符号的整形

参数:

bytes -

返回:

readString

public static String readString(byte[] bytes)

trunc00

public static byte[] trunc00(byte[] bytes)

把前后的00二进制去掉进，要求中间不出现00

参数:

bytes -

返回:

readString

public static String readString(byte[] bytes,
                int offset,
                int length)

toByteArray

public static byte[] toByteArray(byte num)

toByteArray

public static byte[] toByteArray(short num)

toByteArray

public static byte[] toByteArray(int num)

toByteArray

public static byte[] toByteArray(long num)

splitBytes

public static byte[][] splitBytes(byte[] data,
                  int maxLength)

把data分隔成每行最多maxLength列的多行数组

参数:

data - 要分隔的数据源

maxLength - 每行最多列

返回:

or

public static byte[] or(byte[] data1,
        byte[] data2)

and

public static byte[] and(byte[] data1,
         byte[] data2)

xor

public static byte[] xor(byte[] data1,
         byte[] data2)

equals

public static boolean equals(byte[] data1,
             byte[] data2)

concat

public static byte[] concat(byte[] data1,
            byte[] data2)